Why is my big toe numb?

Nerve impingement: Something is irritating the nerve travelling to this area. Often it is a bunion bump that is rubbing against the shoe. There is a small nerve that is right under the skin and goes on into the big toe. See a podiatrist for an exam, diagnosis and care.

Two main sources: Local reason were you could have irritation to the nerve on the top of the toe. Sign of general problem like diabetic neuropathy, disc problem